1. Institute for Problems in Mechanics, Russian Academy of Sciences, Prospekt Vernadskogo 101-1; 119526 Moscow Russia
2. Institute for Metals Superplasticity Problems, Russian Academy of Sciences, 39 Khalturin St.; 450001 Ufa Russia
3. M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 18 S. Kovalevskoi St.; 620990 Ekaterinburg Russia
4. Peter the Great St. Petersburg Polytechnic University, 29, Polytekhnicheskaya St.; 195251 St.-Petersburg Russia
5. Research Laboratory for Mechanics of New Nanomaterials, Peter the Great St.Petersburg Polytechnic University, 29, Polytekhnicheskaya St.; 195251 St.-Petersburg Russia